hydrodynamicist

Etymology tree
Proto-Indo-European *wed-
Proto-Indo-European *-r̥
Proto-Indo-European *wódr̥
Proto-Hellenic *údōr
Ancient Greek ῡ̆̔́δωρ (hū̆́dōr)
Ancient Greek ῠ̔δρο- (hŭdro-)der.
English hydro-
Proto-Indo-European *dewh₂-der.
Proto-Hellenic *dunamai
Ancient Greek δῠ́νᾰμαι (dŭ́nămai)
Ancient Greek δύναμις (dúnamis)
Proto-Indo-European *-kos
Ancient Greek -κός (-kós)
Ancient Greek -ικός (-ikós)
Ancient Greek δυναμικός (dunamikós)lbor.
French dynamiqueder.
English dynamic
English hydrodynamic
Proto-Indo-European *-id-
Proto-Indo-European *-yéti
Proto-Indo-European *-idyéti
Proto-Hellenic *-íďďō
Ancient Greek -ῐ́ζω (-ĭ́zō)
Proto-Hellenic *-tās
Ancient Greek -τής (-tḗs)
Ancient Greek -ῐστής (-ĭstḗs)bor.
Latin -istader.
Old French -istebor.
Middle English -ist
English -ist
English hydrodynamicist
From hydrodynamic + -ist.